Looking at the Ring top 10 and eliminating the k' Bros i can only see two fights that have happened. Adamek Arreola and Povetkin Chagaev (if there are more correct me).

For me this shows a weak list below the Bros, I dont believe they are not talented but they need to start fighting each other and making themselves palatable opps for Wlad (possibly Vit if he doesnt retire).